Transmission mechanism.



J. OLDHAM.

TRANSMISSION MECHANISM.

APPLICATION FILED AUG.2. 1916.

1,210,829. y Patented Jan. 2,1917.

Witnesses I FICE.

*'" l f TRANSMISSION MECHANISM,

` 1,210,829. specification of Letterman'. Patented Jan. 2, 1917.

- Application mea August 2, 1916. serial Ne'iiasi. f

To all whom t may concern: the gripping shoes in section and engaging Be it known that I, JOHN OLnI-IAM, 'a the same. 'citizen of the Unitedl States, residing at kReferring' to the figures by characters of Helm, in the county of Russell and State of reference 1 designates the drive shaft of a 5 Kentucky, have invented a new and useful hydro-carbon engine or the like, the same 60 Transmission Mechanism, of which the folbeing mounted within a suitable supporting lowing is a specification. 1 f structure 2. Mounted for rotation on this This invention relates to transmission shaft is a driven element which, in the presmechanism particularly designed for use in ent instance, is in the yform of a pulley 3 lconnection with hydro-carbon engines. the hub i of which has tubular extensions 65 Heretofore where hydro-carbon engines 5 and 6 eXtending in OppOSite directions have been used it has always been necessary therefrom and engaging the shaft 1. A to utilize-atransmission whereby the driven sproeket'7 is keyed or otherwise secured t0 shaft can be rotated forwardly, brought to the extension 6 and mounted for rotation a stop, or reversed. The mechanism emon said extension between the sprocket and 70 ployed for this purpose,-'however, has been the hub t is a cylindrical drum or casing 8. Y'undesirable `under some conditions because That face Of the Casing IeInOte from the huh of its bulky construction.' Y Forl example, A4L is adapted to be closed by a circular cap 9 where'sta'tionary engines have been used in having a peripheral groove 10 preferablyA 2n cramped positions, as in connection with shaped in cross'section. This cap is adapted 75 some types of agricultural machinery7 0n lto be secured to the casing 8 in any manner motor'boats and thejlike, the ordinary forms desired, as by lmeans of screws 11. A shaft of transmission mechanisms havebeen undel2 iSicaIfried by the casingl 8 and is parallel sirable because of their size and weight. With shaft 1, there being a sleeve 13 mounted lOne of the 0hjectS-I0fthe-Ip1-egent invenfor rotation on the shaft 12. Secured to 80 tion is toprovide a transmission which is this sleeve so as to rotate therewith, is a light, compact and durable and which,when Sprocket 13 and a gear 14. A chain 15 enused in connection' with a driven pulley, will gages the sprockets 7 and 13 so as to trans be housed'therein. y mit motion from one to the other, while gear A further V'object is to provide mechanism ,14 constantly meshes with a smaller gear 16 85 of this character which can be quickly and keyed or otherwise secured to the shaft 1.

"readily controlled so as'to cause the driven The casing'S has an annular flange 17 exelement to rotate ineither of two directions tending close to the web 18 of pulley 3 and or to remain stationary independently of the eXtenOiing nIOllIld Casing 8 iS e Clamping rotationl of the drive, shaft of the motor.l f ring 19 normally supported close t0 butout 90 With Vthe foregoingl and other` objects in of Contact with the flange 17 Secured to view which will appear as the description the Iing 19 are lOOitS 20v WhiCh eXtend proceeds, the invention resides in the comthrough Openings 21 in the Web 18 0f the bination and arrangement of partsl and in pulley and are pivotally connected, as at 22,

the ydetails of construction hereinafterv deto cams 23bearing against the outer face of 95 scribed and claimed, it being understood the web 18. 'These cams are cOnneeted by that changes in the precise embodiment of 'links 24 to arms 25 extending radially from the invention herein disclosed, can be made a sleeve 26 which is mounted to slide upon within the scope of what isclaimed, without the tubular-extension 5. This sleeve 26 can departing from the `spiritl ofthe invention. 'be shifted by any suitable means provided 10o In the accompanying drawings-the prefor that purpose. For example the sleeve ferred form of the inventionl hasy been may be OrIned With an annular gIOOVe 27 shown. in whicharing 28 is looselyseated,this ring In said drawings: Figure 1 is a front ele-l being engaged by a forked shifting lever vation of the transmission mechanism. Fig portions of which have been indicated at 29. 105

2 is a section on line 2 2 Fig. 1. Fig. 3 is a Secured to the Structnre 2 at points adsection on line 3--3 Fig. 2, the cap of the jacent the cap 9.are iexible straps 30 which transmission being removed. Fig. 4 is a extend in opposite directions about the cap transverse section through a portion of the and are secured at their ends to an'actuating cap of the transmission and showing one of lever 31. These straps are provided with 11o V-sh'a'ped yin `cross section."

.hold the casing 8 quently the rotationof shaft 1 Will result element 3 Will 'when --reverse -isfdes1red, 1t 1s necessary -to release 4the rlng .149.

1n the opposite direction, the shoes -Willbe disengaged from the cap 9 and said cap Ypermitted to rotate freely. Y

en the shoes 32 are disengaged from the cap 9 andthe-rin-g19 is'- disengaged from the` Han-ge .17, it Will beyapparent rthatthe shaft 1 -when rotated will merely cause the Egear' 16-to rotate gear 14 with 1 the-resultthat the sprocket `13 Will'travelralong thechain 15 and thus move ina circle about -the sprocketf Thusthecasing 8 will revolve -on 'the shaft 1-and tubular extension 6, While the element-3 vWill remain stationary. Should it bedesired to couple/said element S'ftothe casing S so as-to clause the tvvo` to rotatetofgether, it Wouldinerelybe necessaryto shift the `sleeve v26`so as to cause Ythe arms 25 t'o thrust through links 24 upon the cams 23. The -cams23 Will operate to `pull lthe fbolts -20 and Yagainst the Yflange 17. Thusthe casing l8 `'fand-the element?) Will'be coupled together --and-Willrotate-together. VVVhen'it is desired -toreverse'therotation of the element 3-the Ybrake shoes `32a-re thrust into engagement cause the ring 19 t'o bind With the'walls of the-groove-lO sofas thus to against rotation. Consein the transmission of-rotaryl motion from gear 16 to`r gear 14" and thence from sprocket -13 tosprocket 7. Consequently the driven berotated in .a direction the reverse ofthe direction ofrotationof shaft 1. It is ofcourse to be v'understood *that movement of 'the element I3 from-engagement With theange 17. Importance is attached to the fact that the transmission mechanism is practically entirelyfhoused Withinthe ldriven pulley 3 lso that it Willnot occupy vany undesirable space, but can, in fact, be 4placed in any V.position capable ley. YThusthe'nfi'echanism is-especially useofvaccommodating the pulful lin'connection With motor boats and on some forms of Z'agricultural machinery. It v'is to V`be lunderstood Iof course that fmeans other than those-described `may `be kused vfor Copieif'itliis-1iatent ymaybe'obtained. for ive' cents aeli, Bj'ddi'essingi the K lasliing'ton,A 1).*07.

actuating the 'ring Y19 and for shifting the grippin'glsho'es B2.

`'W hat is claimed is: y

1. vThe "combination with a drive shaft andY a driven element mounted for rotation nfth'e shaft, of a casing mounted for rotation Within the driven element and upon the Iment, v'a 'driven :gear mounted Within "and revoluble with thejcasing'and meshing with the gear upon the shaft, a sprocketrevoluble with the driven gear,1andfa-chain connect- -ing the sprockets. v

2. The combination with la drive shaft and .a .pulley mounted V-forrrotation on lthe shaft, of a casing seated Within and revoluble relative to the pulley, said-.casing being revoluble uponythe shaft, -coperating'means upon the. pulley and casing forholdingl said pulley and casing against .-independentrotw 1t against 'rotation With the pulley, and

mechanism Within, thercasing -for `transmitting motion from theshaft to thepulley'.

3. The combination 'with a` drive shaftand ytion, means forengagingthejcasingtohold' a,pulley mounted forrotation on fthe shaft,

of aecasingl seated Withinl and revolublerelative to the pulley,said .casingjbeingrevoluble Tupony the shafty coperating`-means uponfthepulley and casing 'for holding -said pulley and `.casing `against 'independent roytation, means forjengaging the V.casing to I'hold vit gagainstgrotation vWithxthepulley, and

mechanism Within the casingfortransmitting motion from theV rshaft'to the-pulley,y fsaid mechanism including afgear lsecuredfto ythe shaft, a sprocketrevolu.

le With thejpulrotation Within `with :the casing,

ley, -a gear -mounted for i the casing .and revoluble said .gear (meshing Withj-t erzgear upon the shaft,ja sprocket revolublevvith these'cond mentioned gear, and a ncha-in engaging the sprocket. Y y, l .Y Y

In testimony that I claim the foregoing l:ture in the presence of two Witnesses.

JOHN cnn-11AM@ Witnesses i .HERBERT 1D. .-LAWSON, 5R. .HOAGLANIL Commissioner of Patents. 

